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Simon Glass57251282015-06-23 15:38:43 -06001/*
2 * Copyright (c) 2015 Google, Inc
3 * Written by Simon Glass <sjg@chromium.org>
4 *
5 * SPDX-License-Identifier: GPL-2.0+
6 */
7
8#ifndef __SYSCON_H
9#define __SYSCON_H
10
11/**
12 * struct syscon_uc_info - Information stored by the syscon UCLASS_UCLASS
13 *
14 * @regmap: Register map for this controller
15 */
16struct syscon_uc_info {
17 struct regmap *regmap;
18};
19
20/* So far there are no ops so this is a placeholder */
21struct syscon_ops {
22};
23
24#define syscon_get_ops(dev) ((struct syscon_ops *)(dev)->driver->ops)
25
26/**
27 * syscon_get_regmap() - Get access to a register map
28 *
29 * @dev: Device to check (UCLASS_SCON)
30 * @info: Returns regmap for the device
31 * @return 0 if OK, -ve on error
32 */
33struct regmap *syscon_get_regmap(struct udevice *dev);
34
35/**
36 * syscon_get_regmap_by_driver_data() - Look up a controller by its ID
37 *
38 * Each system controller can be accessed by its driver data, which is
39 * assumed to be unique through the scope of all system controllers that
Simon Glassac94b7b2016-01-17 16:11:08 -070040 * are in use. This function looks up the controller given this driver data.
41 *
42 * @driver_data: Driver data value to look up
43 * @devp: Returns the controller correponding to @driver_data
44 * @return 0 on success, -ENODEV if the ID was not found, or other -ve error
45 * code
46 */
47int syscon_get_by_driver_data(ulong driver_data, struct udevice **devp);
48
49/**
50 * syscon_get_regmap_by_driver_data() - Look up a controller by its ID
51 *
52 * Each system controller can be accessed by its driver data, which is
53 * assumed to be unique through the scope of all system controllers that
Simon Glass57251282015-06-23 15:38:43 -060054 * are in use. This function looks up the regmap given this driver data.
55 *
56 * @driver_data: Driver data value to look up
57 * @return register map correponding to @driver_data, or -ve error code
58 */
59struct regmap *syscon_get_regmap_by_driver_data(ulong driver_data);
60
61/**
62 * syscon_get_first_range() - get the first memory range from a syscon regmap
63 *
64 * @driver_data: Driver data value to look up
65 * @return first region of register map correponding to @driver_data, or
66 * -ve error code
67 */
68void *syscon_get_first_range(ulong driver_data);
69
70#endif